基于变异函数的多波束抽稀间距确定方法

在格网化抽稀方法中,抽稀间距的选取直接影响多波束测深数据抽稀结果和构建海底地形的表征能力。为了合理确定多波束测深数据抽稀间距,将地质统计学中的变异函数理论引入到多波束测深数据抽稀中,由水深变异函数估计海底DEM的精度,得出海底DEM精度与抽稀间距的关系。通过仿真计算表明:如果给定海底DEM的精度,再依据计算得到的拟合水深变异函数参数值,即可确定多波束测深数据抽稀网格间距的大小,该法适用于多波束测深数据抽稀的应用中。

Method for Determining the Multibeam Thinning Spaces Based on Variogram

In the grid thinning method, the selection of thinning spaces affects the thinning outs and the exhibition ability of seafloor directly in the MBES data. In order to determine the optional thinning spaces of MEBS data, the text introduces the varoigram in geostatistics field into the MBES data thinning, and it uses the depth variogram to evaluate the accuracy of seabed DEM and obtains the relationship between thinning spaces and the accuracy of seabed DEM. By simulation and calculation, it shows that if given the accuracy of seabed DEM and according to the parameters of fitting depth variogram, it can confirm the MBES data thinning spaces and this method is applicable to the MBES data thinning.